Polypane. For devs who care
@polypane.app
The browser for web developers that care about their craft and build for everyone. | Try out for free at https://polypane.app | By @kilianvalkhof.com
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Polypane. For devs who care
@polypane.app
· Sep 29
Polypane 26: Accurate device emulation with safe area and small viewport units | Polypane
Polypane 26 brings the most accurate device emulation available anywhere. We now emulate small viewport units (svh) and device-specific safe area insets, two…
polypane.app
Polypane 26 is here!
Emulate safe-inset-area variables and the small viewport height inside Polypane for the most accurate device emulation available.
Of course there's more, like improvements to inspection, measurement overlays, Chromium 140 and much more.
polypane.app/blog/polypan...
Emulate safe-inset-area variables and the small viewport height inside Polypane for the most accurate device emulation available.
Of course there's more, like improvements to inspection, measurement overlays, Chromium 140 and much more.
polypane.app/blog/polypan...
Reposted by Polypane. For devs who care
The chrome-devtools-mcp team made updates to it and to Puppeteer to better support Polypane (and other @electronjs.org apps).
Despite my general qualms about Generative AI, I think that's pretty cool!
Despite my general qualms about Generative AI, I think that's pretty cool!
Chrome-devtools-mcp allows you to connect coding agent like GitHub Copilot and Cursor to Polypane to inspect and get feedback across all your viewports.
Learn how:
polypane.app/blog/using-c...
Learn how:
polypane.app/blog/using-c...
Using chrome-devtools-mcp with Polypane | Polypane
The recently released chrome-devtools-mcp allows you to connect your coding agent (like GitHub Copilot) to a running Chromium instance to inspect and verify…
polypane.app
November 10, 2025 at 2:26 PM
The chrome-devtools-mcp team made updates to it and to Puppeteer to better support Polypane (and other @electronjs.org apps).
Despite my general qualms about Generative AI, I think that's pretty cool!
Despite my general qualms about Generative AI, I think that's pretty cool!
Chrome-devtools-mcp allows you to connect coding agent like GitHub Copilot and Cursor to Polypane to inspect and get feedback across all your viewports.
Learn how:
polypane.app/blog/using-c...
Learn how:
polypane.app/blog/using-c...
Using chrome-devtools-mcp with Polypane | Polypane
The recently released chrome-devtools-mcp allows you to connect your coding agent (like GitHub Copilot) to a running Chromium instance to inspect and verify…
polypane.app
November 10, 2025 at 2:14 PM
Chrome-devtools-mcp allows you to connect coding agent like GitHub Copilot and Cursor to Polypane to inspect and get feedback across all your viewports.
Learn how:
polypane.app/blog/using-c...
Learn how:
polypane.app/blog/using-c...
Reposted by Polypane. For devs who care
Last year we wrote an article on all the ways position:sticky can fail and to this day it remains in the top 10 of weekly most visited pages.
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Getting stuck: all the ways position:sticky can fail | Polypane
CSS's position: sticky is a dream come true for web developers. It allows elements to switch between relative and fixed positioning based on the scroll…
polypane.app
November 6, 2025 at 8:56 AM
Last year we wrote an article on all the ways position:sticky can fail and to this day it remains in the top 10 of weekly most visited pages.
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Last year we wrote an article on all the ways position:sticky can fail and to this day it remains in the top 10 of weekly most visited pages.
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Getting stuck: all the ways position:sticky can fail | Polypane
CSS's position: sticky is a dream come true for web developers. It allows elements to switch between relative and fixed positioning based on the scroll…
polypane.app
November 6, 2025 at 8:56 AM
Last year we wrote an article on all the ways position:sticky can fail and to this day it remains in the top 10 of weekly most visited pages.
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Getting stuck with sticky? This is the post for you.
polypane.app/blog/getting...
Right after (experimental) support for field-sizing landed in chromium 120 back in December 2023 we immediately made good use of it in Polypane and wrote about it and the alternatives we used before:
polypane.app/blog/field-s...
It's too bad that end of 2025 it's still chromium-only.
polypane.app/blog/field-s...
It's too bad that end of 2025 it's still chromium-only.
Field-sizing just works! | Polypane
field-sizing is wild. It's a new CSS property that makes input , textarea and select automatically scale to the size of their content. That means it…
polypane.app
November 3, 2025 at 8:41 AM
Right after (experimental) support for field-sizing landed in chromium 120 back in December 2023 we immediately made good use of it in Polypane and wrote about it and the alternatives we used before:
polypane.app/blog/field-s...
It's too bad that end of 2025 it's still chromium-only.
polypane.app/blog/field-s...
It's too bad that end of 2025 it's still chromium-only.
Reposted by Polypane. For devs who care
Here's a cool photo that Polypane user Marcos sent us recently.
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
October 27, 2025 at 4:30 PM
Here's a cool photo that Polypane user Marcos sent us recently.
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
Be like STEEEEEEEEEVE.
Took me a while, but I've now taken the plunge to improve my web dev workflow by getting a @polypane.app subscription! 🥳 🔥 🤩 polypane.app
Polypane. The browser for web developers who care about their craft and build for everyone.
Polypane is a powerful desktop browser for web developers, built to streamline responsive design, accessibility, and SEO testing, all in one place.
polypane.app
October 28, 2025 at 12:35 PM
Be like STEEEEEEEEEVE.
Here's a cool photo that Polypane user Marcos sent us recently.
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
October 27, 2025 at 4:30 PM
Here's a cool photo that Polypane user Marcos sent us recently.
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost!
Should we make available a set of icons to use?
Reposted by Polypane. For devs who care
Just improved my web dev workflow by getting a @polypane.app subscription! 🥳 🔥 🤩 polypane.app
Polypane. The browser for web developers who care about their craft and build for everyone.
Polypane is a powerful desktop browser for web developers, built to streamline responsive design, accessibility, and SEO testing, all in one place.
polypane.app
October 23, 2025 at 6:25 PM
Just improved my web dev workflow by getting a @polypane.app subscription! 🥳 🔥 🤩 polypane.app
Reposted by Polypane. For devs who care
Only *cool* browsers contribute back to the platform. 😎
Can't wait to see how a company with a $600 billion valuation, that pushed out a new web browser, only for macOS, contributes some of their stacks of money back to the web platform.
a group of people are standing in front of a white truck .
ALT: a group of people are standing in front of a white truck .
media.tenor.com
October 22, 2025 at 9:31 AM
Only *cool* browsers contribute back to the platform. 😎
Reposted by Polypane. For devs who care
Market research!
How often do you use one of those "what is my browser" websites (personally or sent to someone)?
Would you use one that isn't littered with ads or has a design from 1995? What features should it have?
What if you could also use it to collect info to emulate devices in Polypane?
How often do you use one of those "what is my browser" websites (personally or sent to someone)?
Would you use one that isn't littered with ads or has a design from 1995? What features should it have?
What if you could also use it to collect info to emulate devices in Polypane?
October 22, 2025 at 1:42 PM
Market research!
How often do you use one of those "what is my browser" websites (personally or sent to someone)?
Would you use one that isn't littered with ads or has a design from 1995? What features should it have?
What if you could also use it to collect info to emulate devices in Polypane?
How often do you use one of those "what is my browser" websites (personally or sent to someone)?
Would you use one that isn't littered with ads or has a design from 1995? What features should it have?
What if you could also use it to collect info to emulate devices in Polypane?
Share your insights!
Market research!
How often do you use one of those "what is my browser" websites (personally or sent to someone)?
Would you use one that isn't littered with ads or has a design from 1995? What features should it have?
What if you could also use it to collect info to emulate devices in Polypane?
How often do you use one of those "what is my browser" websites (personally or sent to someone)?
Would you use one that isn't littered with ads or has a design from 1995? What features should it have?
What if you could also use it to collect info to emulate devices in Polypane?
October 22, 2025 at 1:43 PM
Share your insights!
Reposted by Polypane. For devs who care
This year, Igalia did some work to improve mobile-device emulation in @polypane.app by adding features to Chromium that could eventually improve Chrome itself, as well as API work to improve Electron. Learn more about the details here: www.igalia.com/2025/10/21/H...
Helping Polypane to Advance Chromium and Electron | Igalia
Igalia is an open source consultancy specialised in the development of innovative projects and solutions. Our engineers have expertise in a wide range of technological areas, including browsers and cl...
www.igalia.com
October 21, 2025 at 1:47 PM
This year, Igalia did some work to improve mobile-device emulation in @polypane.app by adding features to Chromium that could eventually improve Chrome itself, as well as API work to improve Electron. Learn more about the details here: www.igalia.com/2025/10/21/H...
Looking for our logo, icon or other brand assets? Right-click the logo on the site to find our brand kit!
October 15, 2025 at 11:49 AM
Looking for our logo, icon or other brand assets? Right-click the logo on the site to find our brand kit!
Line numbers you say? 🤔
I don't often get nerd sniped * but I just added support for line numbers in @Polypane.app's elements panel after thinking it impossible for the past 5 years.
* okay like once a week. maybe twice.
* okay like once a week. maybe twice.
October 15, 2025 at 11:10 AM
Line numbers you say? 🤔
We just released 26.0.1 with a bunch of fixes and improvements, in particular for the brave souls already using macOS Tahoe: polypane.app/blog/polypan...
Polypane 26: Accurate device emulation with safe area and small viewport units | Polypane
Polypane 26 brings the most accurate device emulation available anywhere. We now emulate small viewport units (svh) and device-specific safe area insets, two…
polypane.app
October 13, 2025 at 9:31 AM
We just released 26.0.1 with a bunch of fixes and improvements, in particular for the brave souls already using macOS Tahoe: polypane.app/blog/polypan...
Reposted by Polypane. For devs who care
New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
October 1, 2025 at 2:34 PM
New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
Kilian is at Frontmania today to speak about the INTL API! Make sure to grab the magazine for a cool article about Polypane and ask Kilian for some stickers!
October 8, 2025 at 8:07 AM
Kilian is at Frontmania today to speak about the INTL API! Make sure to grab the magazine for a cool article about Polypane and ask Kilian for some stickers!
Reposted by Polypane. For devs who care
Polypane 26: Accurate Device Emulation With Safe Area and Small Viewport Units, by @polypane.app:
https://polypane.app/blog/polypane-26-accurate-device-emulation-with-safe-area-and-small-viewport-units/
#releasenotes #polypane #browsers
https://polypane.app/blog/polypane-26-accurate-device-emulation-with-safe-area-and-small-viewport-units/
#releasenotes #polypane #browsers
Polypane 26: Accurate device emulation with safe area and small viewport units | Polypane
Polypane 26 brings the most accurate device emulation available anywhere. We now emulate small viewport units (svh) and device-specific safe area insets, two…
polypane.app
October 7, 2025 at 1:30 PM
Polypane 26: Accurate Device Emulation With Safe Area and Small Viewport Units, by @polypane.app:
https://polypane.app/blog/polypane-26-accurate-device-emulation-with-safe-area-and-small-viewport-units/
#releasenotes #polypane #browsers
https://polypane.app/blog/polypane-26-accurate-device-emulation-with-safe-area-and-small-viewport-units/
#releasenotes #polypane #browsers
Reposted by Polypane. For devs who care
Nerds. Als je websites loopt (*) te bouwen, dan wil je de boel testen in een hele goede, complete browser.
Daarom raad ik de browser aan van Nederlands beste browser-bouwer @polypane.app
Ik gebruik 'm al jaren en ik kan nog steeds nieuwe dingen ontdekken:
polypane.app
Daarom raad ik de browser aan van Nederlands beste browser-bouwer @polypane.app
Ik gebruik 'm al jaren en ik kan nog steeds nieuwe dingen ontdekken:
polypane.app
Polypane. The browser for web developers who care about their craft and users.
Polypane is a powerful desktop browser for web developers, built to streamline responsive design, accessibility, and SEO testing, all in one place.
polypane.app
October 3, 2025 at 11:19 AM
Nerds. Als je websites loopt (*) te bouwen, dan wil je de boel testen in een hele goede, complete browser.
Daarom raad ik de browser aan van Nederlands beste browser-bouwer @polypane.app
Ik gebruik 'm al jaren en ik kan nog steeds nieuwe dingen ontdekken:
polypane.app
Daarom raad ik de browser aan van Nederlands beste browser-bouwer @polypane.app
Ik gebruik 'm al jaren en ik kan nog steeds nieuwe dingen ontdekken:
polypane.app
Reposted by Polypane. For devs who care
Haven't praised @polypane.app lately so here it is. Such an awesome tool. I seriously can't imagine developing anything without it. Worth every penny. Highly recommended.
Polypane. The browser for web developers who care about their craft and users.
Polypane is a powerful desktop browser for web developers, built to streamline responsive design, accessibility, and SEO testing, all in one place.
polypane.app
October 2, 2025 at 7:47 PM
Haven't praised @polypane.app lately so here it is. Such an awesome tool. I seriously can't imagine developing anything without it. Worth every penny. Highly recommended.
Custom media queries are actively being worked on in Chromium, so it won't be long until we can update our complete guide to CSS Media queries!
Check it out to get a head start on using custom media queries.
polypane.app/blog/the-com...
Check it out to get a head start on using custom media queries.
polypane.app/blog/the-com...
The complete guide to CSS media queries | Polypane
Media queries are what make modern responsive design possible. With them you can set different styling based on things like a users screen size, device…
polypane.app
October 2, 2025 at 7:25 AM
Custom media queries are actively being worked on in Chromium, so it won't be long until we can update our complete guide to CSS Media queries!
Check it out to get a head start on using custom media queries.
polypane.app/blog/the-com...
Check it out to get a head start on using custom media queries.
polypane.app/blog/the-com...
New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
October 1, 2025 at 2:34 PM
New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.
Reposted by Polypane. For devs who care
Reposted by Polypane. For devs who care
This was a tiny feature to implement, but I get so much value out of color coding the address bar depending on the domain I'm working on.
Tab customization in @polypane.app: polypane.app/docs/tab-cus...
Tab customization in @polypane.app: polypane.app/docs/tab-cus...
September 30, 2025 at 8:29 AM
This was a tiny feature to implement, but I get so much value out of color coding the address bar depending on the domain I'm working on.
Tab customization in @polypane.app: polypane.app/docs/tab-cus...
Tab customization in @polypane.app: polypane.app/docs/tab-cus...